miércoles, 8 de junio de 2016

Circular plots linking the primary regions of diversity of food crops (only the most significant linkages between regions are shown)
with their current importance in the context of calories (kcal capita−1 d−1)
in regional food supplies. Each region has a colour representing its
own native crops and those colours are connected to other regions due
the importance of those crops in the food supply in other regions. The
direction of the contribution is indicated by both the primary region's
colour and a gap between the connecting line and the consuming region's
segment. The magnitude of contribution is indicated by the width of the
connecting line. IOI, Indian Ocean
Islands; ANZ, Australia and New Zealand; C America, Central America and
Mexico.

Circular plots linking the primary regions of diversity of food crops ( displays the full matrix of linkages)

Degree of calories in national food supplies hat are derived
from crops whose primary regions of diversity do not coincide with the
same region as the country (foreign crops). Scale is degree of foreign crop use (1 = 100% use of foreign crops).

Quantity (tonnes) in national agricultural production that are derived
from crops whose primary regions of diversity do not coincide with the
same region as the country (foreign crops). Scale is degree of foreign crop use (1 = 100% use of foreign crops).

"None of the human faculties should be excluded from scientific activity. The depths of intuition, a sure awareness of the present, mathematical profundity, physical exactitude, the heights of creative reason and sharpness of understanding, together with a versatile and ardent imagination and a loving delight in the world of the senses, they are all essential for a lively and productive apprehension of the moment." J. W. Goethe (1749 - 1832)

Ecology has been eminently a descriptive science despite some pioneering work by theoreticians such as Lotka, Volterra, Nicholson, and others. Description is a first step toward understanding a system. However, such a first step needs to be accompanied by the development of a theoretical framework in order to achieve real insight and, whenever possible, predictive power.

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"The State represents violence in a concentrated and organized form. The individual has a soul, but as the State is a soulless machine, it can never be weaned from violence to which it owes its very existence". -Mahatma Gandhi

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“If our means of investigation became more and more incisive, we would discover the simple under the complex, then the complex under the simple, then again the simple under the complex, and so on, without being able to predict which state would ultimately prevail”Jules Henri Poincaré (1854 –1912)